Added VIC20 port changes from Steve Schmidtke

git-svn-id: svn://svn.cc65.org/cc65/trunk@1376 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/vic20/vic20.inc

@@ -0,0 +1,67 @@
+;
+; Vic20 generic definitions. Stolen mostly from c64.inc - Steve Schmidtke
+;
+
+
+; ---------------------------------------------------------------------------
+; Zero page, Commodore stuff
+
+ST   		= $90		; IEC status byte
+
+FNAM_LEN	= $B7		; Length of filename
+SECADR		= $B9		; Secondary address
+DEVNUM		= $BA		; Device number
+KEY_COUNT      	= $C6		; Number of keys in input buffer
+CURS_FLAG	= $CC		; 1 = cursor off
+CURS_BLINK	= $CD		; Blink counter
+CURS_CHAR	= $CE		; Character under the cursor
+CURS_COLOR      = $287		; Color under the cursor
+CURS_STATE	= $CF		; Cursor blink state
+SCREEN_PTR	= $D1		; Pointer to current char in text screen
+CURS_X		= $D3		; Cursor column
+CURS_Y		= $D6		; Cursor row
+CRAM_PTR	= $F3		; Pointer to current char in color RAM
+
+CHARCOLOR       = $286
+PALFLAG		= $2A6		; $01 = PAL, $00 = NTSC
+
+
+; ---------------------------------------------------------------------------
+; Kernal routines
+
+; Direct entries
+CLRSCR		= $E55F		
+KBDREAD		= $E5CF		
+NAMED_OPEN	= $F495
+NAMED_CLOSE	= $F6DA         
+PLOTCHAR	= $EAAA	 	; Char in A, color in X
+
+; ---------------------------------------------------------------------------
+; Vector and other locations
+
+IRQVec		= $0314
+BRKVec		= $0316
+NMIVec		= $0318
+
+; ---------------------------------------------------------------------------
+; I/O: 6560 VIC
+
+VIC 		= $9000
+VIC_COLOR	= $900F
+
+; ---------------------------------------------------------------------------
+; I/O: 6522 VIA1
+
+VIA1		= $9110
+VIA1_JOY	= $9111
+VIA1_DDRB	= $9112
+VIA1_DDRA	= $9113
+
+; ---------------------------------------------------------------------------
+; I/O: 6522 VIA2
+
+VIA2 		= $9120
+VIA2_JOY	= $9120
+VIA2_DDRB	= $9122
+VIA2_DDRA	= $9123
+